Linux Kernel EROFS CVE-2026-31467

Upgrade to patched Linux kernel versions: 5.15.203+ for 5.15.x branch, 6.1.168+ for 6.1.x, 6.6.131+ for 6.6.x, 6.12.80+ for 6.12.x, 6.18.21+ for 6.18.x, 6.19.11+ for 6.19.x, or 7.0+ for mainline. Patches available via kernel.org stable tree at https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568 (mainline) and corresponding stable branch commits. If immediate patching infeasible, consider compensating controls: disable EROFS filesystem module if not required (add 'install erofs noload' to /etc/modprobe.d/), increase system memory or swap capacity to reduce memory pressure scenarios triggering the deadlock condition (trade-off: does not eliminate vulnerability, only reduces trigger probability), or avoid dm-verity configurations with EROFS until patched (trade-off: loses integrity verification). For container environments using EROFS images, switch to alternative image formats (squashfs, overlayfs) until kernel updated. Monitor for unexplained system hangs during high memory usage as potential exploitation indicator. No user interaction required for exploitation once vulnerable configuration exists, prioritize patching for production systems using EROFS.